SG73367A1 - Optical isolation amplifier with sigma-delta modulation - Google Patents

Optical isolation amplifier with sigma-delta modulation

Info

Publication number
SG73367A1
SG73367A1 SG1996001805A SG1996001805A SG73367A1 SG 73367 A1 SG73367 A1 SG 73367A1 SG 1996001805 A SG1996001805 A SG 1996001805A SG 1996001805 A SG1996001805 A SG 1996001805A SG 73367 A1 SG73367 A1 SG 73367A1
Authority
SG
Singapore
Prior art keywords
signal
analog
sigma
digital
chip
Prior art date
Application number
SG1996001805A
Inventor
David J Gampell
Michael D Mcjimsey
Ralph E Lovelace
Randall Canha
Original Assignee
Agilent Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Agilent Technologies Inc filed Critical Agilent Technologies Inc
Publication of SG73367A1 publication Critical patent/SG73367A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/22—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-emitting devices, e.g. LED, optocouplers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/30—Delta-sigma modulation
    • H03M3/322—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M3/368—Continuously compensating for, or preventing, undesired influence of physical parameters of noise other than the quantisation noise already being shaped inherently by delta-sigma modulators

Abstract

An optical isolation amplifier which generates a low-noise analog output signal linearly related to an analog input signal and fits within a conventional 8-pin dual in-line package (1) comprises an input chip (2) having a sigma-delta analog-to-digital (A/D) converter (7) for converting an analog input signal to a digital signal. The sigma-delta converter (7) is used to modulate an off-chip LED (13) which optically transmits the signal to a photodetector (15) on a separate output chip (3) having an accurate optical recovery section (17) for reproducing the transmitted signal. Also contained on the output chip (3) is a digital-to-analog (D/A) converter (21) for converting the digital signal to an analog output signal linearly related to the analog input signal. <IMAGE> <IMAGE>
SG1996001805A 1992-06-05 1993-05-12 Optical isolation amplifier with sigma-delta modulation SG73367A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/893,786 US5287107A (en) 1992-06-05 1992-06-05 Optical isolation amplifier with sigma-delta modulation

Publications (1)

Publication Number Publication Date
SG73367A1 true SG73367A1 (en) 2000-11-21

Family

ID=25402087

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1996001805A SG73367A1 (en) 1992-06-05 1993-05-12 Optical isolation amplifier with sigma-delta modulation

Country Status (7)

Country Link
US (1) US5287107A (en)
EP (1) EP0573156B1 (en)
JP (1) JP3174200B2 (en)
KR (1) KR100331391B1 (en)
DE (1) DE69314542T2 (en)
SG (1) SG73367A1 (en)
TW (1) TW221538B (en)

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Also Published As

Publication number Publication date
TW221538B (en) 1994-03-01
KR100331391B1 (en) 2002-06-28
JP3174200B2 (en) 2001-06-11
DE69314542D1 (en) 1997-11-20
US5287107A (en) 1994-02-15
JPH0661865A (en) 1994-03-04
EP0573156B1 (en) 1997-10-15
EP0573156A1 (en) 1993-12-08
DE69314542T2 (en) 1998-02-12

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